Apparatus and method for sending and receiving broadcast signals
A broadcast signal receiver includes a tuner for tuning a broadcast signal, a reference signal detector for detecting pilots from the tuned broadcast signal, a de-framer for de-framing a signal frame of the broadcast signal and deriving service data based on a number of carriers of the signal frame, and a decoder for performing error correction process on the derived service data.
1. A device, comprising:
a tuner configured to receive a broadcast signal including a frame; and
a demodulator configured to demodulate OFDM (Orthogonal Frequency Division Multiplexing) symbols having a number of carriers in the frame, wherein:
the number of carriers of the frame is determined based on a Fast Fourier Transform (FFT) size and a reducing coefficient for the frame,
the reducing coefficient is represented as k that has a value of 0, 1, 2, 3 or 4,
the number of carriers for 8K FFT is determined as 6913 for k=0, 6817 for k=1, 6721 for k=2, 6625 for k=3 and 6529 for k=4,
the number of carriers for 16K FFT is determined as 13825 for k=0, 13633 for k=1, 13441 for k=2, 13249 for k=3 and 13057 for k=4, and
the number of carriers for 32K FFT is determined as 27649 for k=0, 27265 for k=1, 26881 for k=2, 26497 for k=3 and 26113 for k=4.
2. The device of claim 1 , the device further comprising:
a decoder configured to decode data in the frame.
3. The device of claim 1 , wherein the number of carriers is less than or equal to a maximum number of carriers for the FFT size.
4. A method, comprising:
receiving a broadcast signal including a frame; and
demodulating OFDM (Orthogonal Frequency Division Multiplexing) symbols having a number of carriers in the frame, wherein:
the number of carriers of the frame is determined based on a Fast Fourier Transform (FFT) size and a reducing coefficient for the signal frame,
the reducing coefficient is represented as k that has a value of 0, 1, 2, 3 or 4,
the number of carriers for 8K FFT is determined as 6913 for k=0, 6817 for k=1, 6721 for k=2, 6625 for k=3 and 6529 for k=4,
the number of carriers for 16K FFT is determined as 13825 for k=0, 13633 for k=1, 13441 for k=2, 13249 for k=3 and 13057 for k=4, and
the number of carriers for 32K FFT is determined as 27649 for k=0, 27265 for k=1, 26881 for k=2, 26497 for k=3 and 26113 for k=4.
5. The method of claim 4 , the method further comprising:
decoding data in the frame.
6. The method of claim 4 , wherein the number of carriers is less than or equal to a maximum number of carriers for the FFT size.
7. A device, comprising:
a frame builder configured to generate a frame having a number of carriers, wherein:
the number of carriers of the frame is determined based on a Fast Fourier Transform (FFT) size and a reducing coefficient for the frame,
the reducing coefficient is represented as k that has a value of 0, 1, 2, 3 or 4,
the number of carriers for 8K FFT is determined as 6913 for k=0, 6817 for k=1, 6721 for k=2, 6625 for k=3 and 6529 for k=4,
the number of carriers for 16K FFT is determined as 13825 for k=0, 13633 for k=1, 13441 for k=2, 13249 for k=3 and 13057 for k=4, and
the number of carriers for 32K FFT is determined as 27649 for k=0, 27265 for k=1, 26881 for k=2, 26497 for k=3 and 26113 for k=4; and
a modulator configured to modulate a broadcast signal including the frame.
8. The device of claim 7 , the device further comprising:
a transmitter configured to transmit the broadcast signal.
9. The device of claim 7 , wherein the number of carriers is less than or equal to a maximum number of carriers for the FFT size.
10. A method, comprising:
generating a frame having a number of carriers, wherein:
the number of carriers of the frame is determined based on a Fast Fourier Transform (FFT) size and a reducing coefficient for the frame,
the reducing coefficient is represented as k that has a value of 0, 1, 2, 3 or 4,
the number of carriers for 8K FFT is determined as 6913 for k=0, 6817 for k=1, 6721 for k=2, 6625 for k=3 and 6529 for k=4,
the number of carriers for 16K FFT is determined as 13825 for k=0, 13633 for k=1, 13441 for k=2, 13249 for k=3 and 13057 for k=4, and
the number of carriers for 32K FFT is determined as 27649 for k=0, 27265 for k=1, 26881 for k=2, 26497 for k=3 and 26113 for k=4; and
modulating a broadcast signal including the frame.
11. The method of claim 10 , the method further comprising:
transmitting the broadcast signal.
12. The method of claim 10 , wherein the number of carriers is less than or equal to a maximum number of carriers for the FFT size.